DOE-HDBK-1016/2-93Electronic Diagrams and SchematicsELECTRONIC DIAGRAMS, PRINTS, AND SCHEMATICSRev. 0Page 1PR-04ELECTRONIC DIAGRAMS,PRINTS, AND SCHEMATICS To read and understand an electronic diagram or electronic schematic,the basic symbols and conventions must be understood.EO 1.1IDENTIFY the symbols used on engineeringelectronic block diagrams, prints, and schematics, forthe following components.a.Fixed resistorn.Circuit groundb.Variableo.Fuseresistorp.Plugc.Tapped resistorq.Headsetd.Fixed capacitorr.Light bulbe.Variables.Silicon controlled rectifier capacitor(SCR)f.Fixed inductort.Half wave bridge rectifierg.Variableu.Full wave rectifierinductorv.Oscillatorh.Diodew.Potentiometeri.Light emittingx.Rheostatdiode (LED)y.Antennaj.Ammeterz.Amplifierk.Voltmeteraa.PNP and NPN transistorsl.Wattmeterbb.Junctionm.Chassis groundEO 1.2STATE the purpose of a block diagram and anelectronic schematic diagram.IntroductionElectronic prints fall into two basic categories, electronic schematics and block diagrams.Electronic schematics represent the most detailed category of electronic drawings. They depictevery component in a circuit, the component's technical information (such as its ratings), andhow each component is wired into the circuit. Block diagrams are the simplest type of drawing.As the name implies, block diagrams represent any part, component, or system as a simplegeometric shape, with each block capable of representing a single component (such as a relay)or an entire system. The intended use of the drawing dictates the level of detail provided by